Visitors have already stepped on the infamous peanut butter floor, less than a week after it opened in Rotterdam. The Depot of Museum Boijmans Van Beuningen said that at least one person had walked on the exhibit, and another had dropped their phone into the peanut butter while attempting to take a photo. In honour of Dutch conceptual artist Wim T. Schippers, who passed away in June, the museum brought back his most famous work, the peanut butter floor. Schippers...